The pot is the cheap part. A 6.5 cubic foot blast pot rents for about $90 to $150 a day, the compressor that feeds it adds $100 to $190, and the abrasive is sold by the bag rather than rented. Budget the three together or the quoted rate will be less than half of what the day costs.
Three items, one job
You are hiring a pressure pot, an air compressor big enough to keep it fed, and hose with a nozzle. A 185 cfm tow-behind compressor suits a common quarter-inch nozzle; step up the nozzle and the air demand climbs faster than you expect. Undersize the compressor and the work slows to a crawl while both rentals keep billing.
The media is bought, not rented
Yards sell abrasive by the fifty pound bag and take back what is unopened. Coal slag and garnet are the usual choices, and consumption is heavy, often several hundred pounds an hour at a working nozzle. Estimate the surface first, buy generously, and return the surplus rather than stopping mid-job to fetch more.
Actual sand is largely gone, and why
Silica sand blasting generates respirable crystalline silica, which is regulated with an exposure limit and required controls, so most rental counters supply slag or garnet instead. That does not make the work dust-free: enclosure, respiratory protection and keeping others out of the area still apply, and the containment is your job, not the yard's.
What is not in the rental
Blast hoods with supplied breathing air, the filter that conditions that air, and disposable coveralls are usually separate hires or your own kit. Ask before you collect. Also plan where the spent abrasive goes: on a driveway or a shopfront it becomes waste you sweep and remove, and on some coatings that waste is regulated.
Questions people ask about sand blaster rental
How big a compressor does a sand blaster need?
Match it to the nozzle. A quarter-inch nozzle at around 90 psi wants roughly 130 to 190 cfm, which is why the towable 185 cfm unit is the standard partner. A three-eighths nozzle can ask for double that, and no amount of patience makes a small compressor keep up.
Can I rent a sand blaster for a weekend job?
Yes, and the weekend rate is often close to a single day at yards that collect on Monday. Ask, because the compressor and the pot may be on different rate cards. Budget the media separately, since it is the item most likely to run out on a Sunday.
What surfaces should not be blasted?
Anything with lead paint, asbestos-containing coatings or thin sheet metal. Blasting lead paint turns a coating problem into an airborne one with its own rules, and thin steel or aluminium warps and pits quickly. Soda or low-pressure media are gentler options for delicate substrates.